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Tape full usage

padmaraj_1
Occasional Contributor

Tape full usage

We are using 1.6TB ultrium tape.When i format it shows 800GB as full capacity.BUt it holds as large as 1400Gb Data.What is the concept behind that?

S.Padmaraj

1 REPLY
itpalacech
Advisor

Re: Tape full usage

It depends on the hardware compression. 800GB is the guaranteed capacity, 1600GB is the capacity if you assume a 2:1 files compression. If the files you re backing up are already compressed, you're not going any further than 800GB. 

Some files can get also a compression higher than 2:1.

 

EDIT 31 July: I've edited my reply above.